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Fair Value Measurements Recurring Fair Value Measurements (Details) - Fair Value, Inputs, Level 2 [Member] - USD ($)
$ in Millions
Jul. 01, 2017
Dec. 31, 2016
Jun. 18, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Derivative Asset $ 0.6 $ 6.7 $ 1.2
Derivative Liability $ (14.7) $ (5.6) $ (16.8)